Vercel AI Updates: September 24, 2026

1. TanStack AI Agents Can Call OAuth-Protected MCP Servers Through Vercel Connect

Vercel. A new @vercel/connect/tanstack-ai subpath exports connectMCPTransport, which wraps a TanStack transport config with a Connect-backed auth provider. The provider runs before every MCP request so tokens are always fresh, and createMCPClient fails with a consent challenge before the model runs if the user has not granted access. No credentials are stored or rotated on the application side. Source

2. Gemini 3.8 TTS Models Reached AI Gateway on Launch Day

Vercel. google/gemini-3.8-flash-lite-tts and google/gemini-3.8-flash-tts are available on AI Gateway, covering more than 100 languages with long-form narration, delivery control, and two-speaker dialogue. Flash-Lite targets high-volume generation with tone and pacing controls; Flash adds voice and character design from natural-language prompts including acting cues. Source

3. Blob Store Count Limits Are Gone on Every Plan

Vercel. The previous caps of 100 Blob stores on Hobby, 500 on Pro, and 1,000 on Enterprise no longer apply, and store creation is billed as a Blob Advanced Operation alongside put(), copy(), and list() at $5.00 per million on Pro. Deleting a store is free. For agent workloads this makes a store-per-tenant or store-per-run hard boundary practical instead of relying on pathname conventions. Source